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S.124

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6S.80 S.125
#S-124

Description

UK B.S. BS 2S 124, S.124 Specialsteel Specification for aircraft material. 12 per cent chromium corrosion-resisting steel (free machining) (45/55 tonf/sq in: limiting ruling section 6 in) and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: S.124
Category Class Grade Standard Country Application
Steel GradesSpecialsteel S.124 B.S. UK Specification for aircraft material. 12 per cent chromium corrosion-resisting steel (free machining) (45/55 tonf/sq in: limiting ruling section 6 in)

Chemical composition(mass fraction)(wt.%) of the S.124

C Si Mn P S Cr Ni Mo Nb/Ti Zr
0.15 -0.25 ≤1.00 ≤1.50 ≤0.045 0.15 -0.40 12.00 -14.00 ≤1.00 ≤0.60 ≤ ≥ ≤0.60

Mechanical Properties of steel grade S.124

Yield
Rp0.2 (MPa)		 Tensile
Rm (MPa)		 Impact
KV/Ku (J)		 Elongation
A (%)		 Reduction in cross section on fracture
Z (%)		 As-Heat-Treated Condition Brinell hardness (HBW)
133 (≥) 275 (≥) 31 31 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 221

Physical Properties of steel grade S.124

Temperature
(°C)		 Modulus of elasticity
(GPa)		 Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
(W/m·°C)		 Specific thermal capacity
(J/kg·°C)		 Specific electrical resistivity
(Ω mm²/m)		 Density
(kg/dm³)		 Poisson’s coefficient, ν
44 - -     0.41 -  
365 657 - 42.3 211   -  
279 - 13 43.2   321 424

Heat Treatment of steel grade S.124

Heat treated : 1542°C - 1222°C

Technological Curves of steel grade S.124

Relevant standard of S.124

BS 2S 124 Specification for aircraft material. 12 per cent chromium corrosion-resisting steel (free machining) (45/55 tonf/sq in: limiting ruling section 6 in) BS-2S-124.pdf
6S.80 S.125
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Jiangyou Longhai Special Steel Co.,Ltd.

Our main peoducts of steel are many kinds of special steel, like tool steel, mould steel, alloy steel, alloy constructural steel, heat-resistant steel, high speed tool steel,spring steel and bearing steel , stainless steel and so on, which have formed 12 series and more than 350 varieties with n...

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